25870117 has 16 divisors (see below), whose sum is σ = 32941440. Its totient is φ = 19760832.

The previous prime is 25870111. The next prime is 25870123. The reversal of 25870117 is 71107852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25870111) and next prime (25870123).

It is not a de Polignac number, because 25870117 - 2³ = 25870109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25870111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (2058840).

Almost surely, 2^25870117 is an apocalyptic number.

It is an amenable number.

25870117 is a deficient number, since it is larger than the sum of its proper divisors (7071323).

25870117 is a wasteful number, since it uses less digits than its factorization.

25870117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9852.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 25870117 is about 5086.2674919827. The cubic root of 25870117 is about 295.7554781481.

Adding to 25870117 its reverse (71107852), we get a palindrome (96977969).

The spelling of 25870117 in words is "twenty-five million, eight hundred seventy thousand, one hundred seventeen".